An exhaust leak is the condition when some amount of exhaust gases leak out before reaching the tailpipe. Repairing the exhaust leak begins with spotting where the issue is. Noisy engine, vibration, reduction in gas mileage- are the typical warning signs from which you can guess your vehicle is having an exhaust leak. Consult a certified car mechanic, if you find any of these symptoms and keep yourself safe from the risk that might be caused by the entrance of poisonous gases into the cabin.